Final answer:
The Enterprise Service Management Integrations framework leverages the Integration designer capability to communicate with external instances and third-party systems.
Step-by-step explanation:
The capability that the Enterprise Service Management Integrations framework leverages to communicate with external instances and third-party systems is the Integration designer. This component allows for the integration of HR applications with third-party systems by designing the necessary connections and communication protocols. It enables data exchange and interaction between different systems, ensuring seamless integration and interoperability.